Escapement for chronometers.



R. A. WEN'TWORTH. ESCAPEMENT ron CHRONOMETERS.

APPLICATION FILED JULY 5, H6- 1 1,213,716. Patented Ja .23,,19 17.

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' rendered possible; g H The preferred'formaof invention, is. dis

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i EscAPEMEiI'TsoR ori nozto mn'rnns.

T aZZ whomz'i, may concern; 1 Be it knowiifth'at' I,.RjIcH,1\IoN n WENT- W'onT'H, a'citiZen of the'United States, residing; at "Hoe, in the county of Knox and State of ain'e, have'invented' ,certain new and useful. Improvements in Escapem ents is a specification.

for Chronometei's, 'of which the following My invention relates 1 to an improvement,

in escapement'sfor chronoineters'. f

The objects of my invention are to ro;

vidfe anew and nov'el arrangement dielements, whereby strain onthe works is eliminated, smoother actlon 1s obta ned anda more efficientiitilization of .theipower.

closed in the. a"ccoinpanyingv drawings,in which g Figure 1 is asldo. elevation; FigNQJisa vertic'alsectiion taken0n1i1ne2+2 of. Fig. 1 F 3 is a. horizontal section of Fig. l; and

ance spring 7 is fastened to the hub of the wheel 4:, and to'astationary lug'8' on the arm 2. A power shaft 9is pivotally connected between a rigid arm 10 and the base 3, and oarries'on it the driven, gear 11, which is adapted to be engaged by the drive gear 12 carrying the power from the motor.

Above the gear 11 is rigidly afiixed to the shaft 9 a star wheel 13 having a plurality; -of arms 14-44, which are adapted to engage the groove in the pallet 6.

Above the star wheel 13 is a gear 15 of larger size thanthe gear wheel 11, engaging a similar gear wheel 16 on the driven shaft 17, pivotally supported between the arms 18 and 19. This shaft 17'. has also integrallyfastened upon it a-star wheel 20, having a pluralityofarms 21'21, adapted to engage the groove in the pallet 5i It will "Specification of Letters Batentl 51 15 23511917." rnh 119a at 1 16.. semi K 675710.

be Ilen -ea. 'tllia t thejaiins iiiana 2 1; the,

wheels 1 3 'an'd 20 respectively, j

in relation to, each.0ther.,

V The groovesinjtlieIpjall ts areas. forth, lnfsl agg'eid relationwithfeja h other'and are.

so placed as to be eiigaged the? on.

rhea-Caesar the g opposite directions In-pper nonthepowe will iorcethe drive gear12to rotate the driven ear" 111, t1i1is" rotating theistar wheel:13,tlie1arnis14of,

whichjengage the grows 6'; mine anel; 6,,

giving the shaft 51, and balance, wheel a rotativeimpulse against the tension of the. sprlngli @At the fsame time, through the gears15 and 16 the star when eo'winhave b'een. actuated in the; opposite'fdirection aiid an eijwnibqforcea against the groove in il gpana 5 ,1 uponfthe maximisation,

of the names when, causedby the tension of. the spring oyercoming the impetus, given by an arm on the star wheel 13. g 7 Catching the balance; wheel on the rebound, as .it were, the arm 21 gives the I wheel 1 an added impulse to thatalready given by'the spring 7 This impulse is, in turn, overcome by the tension of'the spring I 7 and the wheel returns, in a rotation in the same clirectionas the first one described, and

so the operation continues. I The star wheels can work without conflicting action because the arms of each are staggered with relation to- -the arms of the. I

other.

Iclaim:

wheehashaft, a plurality of actuated pale tions for oscillating said balancewheel. 2. In an escapement, the combination with 1. An. escapement comprisinga balance- I lets on said'shaft, and star-wheels engaging-- I said pallets and 'movingin different direcs a balance Wheel, of a shaft, groovedpallets on said shaft, star-wheels'so located 'asto engage the. grooves of said pallets, and

directions, and thus to oscillate the balancewheel.

geared together so as toturn in opposite 3. In an escapement, the combination'with' a balance-wheel and shaft,'ofnotched pallets. in superimposed relation on said shaft, es-

cape-'wheels'geared so as to revolve inaoppohsite directions and engage the notches in" 60' v the sta r wheelslg rndfQOtffItyfsfill be' noti'cedf' that these, stair. wheels13. andQj Owilhdue't ears, 15 and 16, operate in.

' grooves in said pallets being in staggered said pallets, said balance-wheel and pallets permitting intermittent movement of fsaid escape-wheels. 7 a

4. An escapement comprising a shaft, a

balance wheel thereon, pallets on said shaft,

having grooves therein, a power shaft and j a driven shaft substantially parallel to said first mentioned shaft, star wheelson said powerand saidr driven shafts, and means for actuating said last mentioned shafts, whereby the pallets will be alternately engaged by said star wheels, and the balancewheel will be oscillated in opposite'direc'tions alternately.

5. An escapement comprising a' balance shaft carrying a balance wheel thereon, pallets having vertical grooves therein, the

relation to each other, actuating means in close proximity to said balance shaft'comprising star wheels adapted'to engage the.

to saidbalance shaft, whereby to limit" its rotation, power and driven shafts geared to each other and mounted upon said base, r

actuating means on said power and said driven shafts, and means'for actuating said power shaft, whereby upon the continual rotationthereof in one direction,the said said escape-wheels adapted to enter the notches in saidpallets, 1 and meansfor rotating said escape-wheels inlopposite direct, tions for permitting intermittent -movement 7 of said escape-wheels and intermittent engagement of said pallets by-the arms on said escape-wheels V r a V V 8, In an escapement mechanism, the combination with a balance-wheel and shaft, two escapement collets carried by said shaft,

two star-wheels mounted adjacent each other and adjacent the shaft, and geared together to operatein opposite directions, said starwheels being arranged to engage with said collets, a driving-gear, and connections from said gear to said star-wheels so that they maybe driven in oppositedirections, said collects having notches therein for permitting the escape of the teeth of said starwheels, and for receiving impulses there from. 1 i e In testimony whereof I afiix my signature.

Copies of thit patent may be o btalne d for five cents each, b y a ddressing the Commissioner of Patents,

- Washington, D. 0.? V i a V RICHMOND A. WENTWORTH. l 

